mirror of
https://github.com/golang/go
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45 lines
946 B
Go
45 lines
946 B
Go
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// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cgotest
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/*
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#include <stdint.h>
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typedef struct {
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char x;
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long y;
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} __attribute__((__packed__)) misaligned;
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int
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offset7560(void)
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{
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return (uintptr_t)&((misaligned*)0)->y;
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}
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*/
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import "C"
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import (
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"reflect"
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"testing"
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)
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func test7560(t *testing.T) {
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// some mingw don't implement __packed__ correctly.
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if C.offset7560() != 1 {
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t.Skip("C compiler did not pack struct")
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}
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// C.misaligned should have x but then a padding field to get to the end of the struct.
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// There should not be a field named 'y'.
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var v C.misaligned
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rt := reflect.TypeOf(&v).Elem()
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if rt.NumField() != 2 || rt.Field(0).Name != "x" || rt.Field(1).Name != "_" {
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t.Errorf("unexpected fields in C.misaligned:\n")
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for i := 0; i < rt.NumField(); i++ {
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t.Logf("%+v\n", rt.Field(i))
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}
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}
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}
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